EP1077151A1 - Kopfstützenantrieb - Google Patents
Kopfstützenantrieb Download PDFInfo
- Publication number
- EP1077151A1 EP1077151A1 EP00114820A EP00114820A EP1077151A1 EP 1077151 A1 EP1077151 A1 EP 1077151A1 EP 00114820 A EP00114820 A EP 00114820A EP 00114820 A EP00114820 A EP 00114820A EP 1077151 A1 EP1077151 A1 EP 1077151A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- headrest
- drive according
- headrest drive
- guide
- levers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 239000013013 elastic material Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
- B60N2/0224—Non-manual adjustments, e.g. with electrical operation
- B60N2/02246—Electric motors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
- B60N2/0224—Non-manual adjustments, e.g. with electrical operation
- B60N2/02246—Electric motors therefor
- B60N2/02253—Electric motors therefor characterised by the transmission between the electric motor and the seat or seat parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/80—Head-rests
- B60N2/806—Head-rests movable or adjustable
- B60N2/809—Head-rests movable or adjustable vertically slidable
- B60N2/829—Head-rests movable or adjustable vertically slidable characterised by their adjusting mechanisms, e.g. electric motors
Definitions
- the invention relates to a headrest drive for motor vehicles an electric drive motor.
- headrest drives In addition to pneumatic Solutions are also known for headrest drives with electrical drives, that do not need a compressed air supply.
- a headrest drive is known in which an electric Drive motor drives a spindle drive via a flexible shaft, which drives the movement the headrest does.
- DE 43 04 636 C1 is a solution known in which a motor drives a rack, its transverse movement in turn causes the headrest to be adjusted.
- the above Solutions have the disadvantage that considerable measures are taken in the seat for picking up and guiding the moving parts must increase the design effort and thus the manufacturing costs.
- the object of the invention is a headrest drive for motor vehicles to create, which can be realized with electric drive in modular design leaves.
- the object is achieved in that the motor is a lever gear drives with two intersecting, pivoted levers, the free ends of which lie in a direction transverse to the direction of travel of the headrest Groove are slidably guided in a guide element that with the headrest connected via at least one strut and in a guide in the direction of travel the headrests are moveable.
- the headrest drive according to the invention has the advantage that it is similar a window lifter drive can be easily manufactured as a module for that only simple attachment points must be provided on the seat side. Such lever gears also work very quietly, which is comfort benefits.
- the invention enables Lever gearboxes comparatively large strokes.
- the two levers can be pivoted separately about different axes of rotation are stored, preferably the levers with gears or Zahradsegmenten are provided around their axis of rotation, which mesh with each other.
- lever mechanism does not work on a scissor-lift principle, but a very simple lever principle is implemented, in which the opposing forced movement of the lever arms does not have a Triangle geometry, but through the meshing gears is achieved.
- the motor expediently drives the gearwheel via a reduction gear or gear segment of a lever.
- the reduction gear enables the use of small, fast rotating electric motors that are comparatively require little installation space and therefore enable small module dimensions.
- the reduction gear can basically be at any point Attack gear one of the two levers, so that one in the arrangement the engine is largely free and meets the requirements of each Can easily adjust the seat.
- the necessary adjustment forces when adjusting a headrest significantly are preferably lower than in the case of a window to be adjusted at least the lever of the lever mechanism made of plastic, whereby the Reduce manufacturing costs and the weight of the headrest drive to let. It is particularly preferred that the gears or gear segments in one piece to train with the levers, especially during manufacture made of plastic a further reduction in manufacturing costs and weight possible are.
- the seat side can usually anyway provided guide tubes used to guide the guide element are, so that an installation of the headrest drive according to the invention without extensive modifications even in existing seat constructions is conceivable. In any case, that is with a seat or a vehicle rear seat constructive effort to integrate to integrate the headrest drive very low.
- the at least one strut has a joint that folds down the headrest forward or backward with the seat extended accordingly Headrest allows.
- Such a solution allows the headrests to be used on unused seats in a vehicle in a simple manner and thereby the Improve all-round visibility for the driver, especially in the rear seats a headrest drive of this type is advantageous. Especially It is advantageous to combine such a headrest drive with one Seat occupancy detection that automatically folds away when the seats are not in use the headrest causes and the associated headrest when the seats are occupied moves into their erected position. An adjustment of the headrest on the body size can be done manually if necessary.
- joints of the two struts preferably consist of rubber-elastic Material encased tensile elements, for example from a Wire exist or can be constructed similar to a Bowden cable.
- joints can each have a threaded pin at their ends feature that in tubular elements, which are the upper and lower strut parts form, are screwed.
- the upper strut parts connected to the headrest can be folded down can be realized, for example, in that the guide tubes at their upper Ends have deflection areas that are open to the front or back and with the headrest extended accordingly, fold it down to the open position Enable side.
- the folding itself is preferably done by itself Gravity is achieved by, for example, the guide tubes accordingly the backrest of the vehicle seat are arranged inclined. Thereby If the headrests are extended sufficiently, they fold down rear, for example in a suitable recess in the parcel shelf Vehicle.
- a limit switch can limit the travel of the headrest, the limit switch a sensor such as B. can be a Hall sensor.
- the headrest drive 10 shown in Fig. 1 consists essentially of a driven by an electric motor 12 gear 14, the rotational movement of the motor 12 converts into a linear movement, multi-part connecting struts 16, which connect the transmission 14 to a headrest 18, and deflection elements 20, which are fixedly mounted on the vehicle side and a Form the guide of the struts 16 transverse to their direction of travel.
- the adjustment gear 14 has two intersecting levers 22, 24, which around each have a bearing axis 26, 28 rotatable on a holder, not shown are stored.
- the levers 22, 24 are concentric about the bearing axes 26, 28 designed as toothed wheel segments 30, 32 with the same pitch circle diameter, the gear segments 30, 32 of the two levers 22, 24 mesh with one another and thereby for a synchronous, opposite swiveling movement of the Provide levers 22, 24.
- the struts 16 exist in addition to the lower strut tubes already mentioned 50 each from an upper strut tube 52 and from flexible elements 54, which articulate the two strut tubes 50, 52 together.
- the structure the flexible elements 54 is shown in more detail in FIG. 2. From this picture it can be seen that the flexible elements 54 essentially consist of a Bowden cable 56 and a rubber sleeve 58 encasing this, where the rubber sleeve 58 on both sides of a hollow drilled threaded pin 60 is limited, which in the upper strut tube 52 and the lower strut tube 50 can be screwed in.
- the cohesion of the flexible elements 54 becomes secured by crimp connections 62, on which the Bowden cable 56 is fixed and the threaded pin 60 and the rubber sleeve 58 possibly under Hold the preload between them.
- the flexible elements 54 are designed that its largest diameter is not larger than the diameter of the Strut tubes 50, 52 is.
- the struts 16 are guided in deflection elements 20, which are in the backrest for example, a vehicle rear seat are integrated.
- the deflecting elements 20 consist essentially of a tubular guide portion 64 which the Struts 16 leads, and a deflection area 66, which consists essentially of a Rounding 68 and an adjoining, essentially horizontal aligned support 70, the semicircular cross section of the Rounding 68 and the support 70 is adapted to the diameter of the strut 16.
- the support 70 of the two struts 16 show in the installed position to the rear of the vehicle and the guide areas 64 correspond to the backrest arranged inclined.
- the motor 12 and the transmission 14 are on a bracket already mentioned (Not shown) stored or attached so that the entire headrest drive 10 is pre-assembled in a modular design according to FIG. 1 and during assembly of the Back seat is integrated into the backrest.
- the flexible elements 54 in the guide area 64, and also part of the upper strut tubes 52 is located over a certain length in the guide area 64.
- the headrest 18 can thus be used in the event of an accident Take up forces, with a height adjustment to adapt to body size of the vehicle occupant by operating the engine 12 and the like Swiveling the lever 22, 24 is possible.
- the headrest drive 10 is preferably with seat occupancy detection coupled, the headrest 18 in a seat occupied in that shown in Fig. 1 Position moves. If the seat occupancy detection is not triggered, the motor 12 moves the struts 16 and the headrest 18 into a position in which are the flexible elements 54 in the deflection areas 66. Due to the inclination of the struts 16, the dead weight of the headrest leads 18 for folding backwards, for example in a recess in the parcel shelf, the upper strut tubes 52 laying on the support 70. This position represents the maximum extended end position of the headrest drive 10 represented by a microswitch 72 and a circuit board 74 is detectable in the area of the gear segment 32 of the second lever 24. The Folding down the headrests 18 is due to the flexible rubber sleeves 58 further possible.
- the seat recognition in turn activates the electric motor 12, the to raise the headrest 18 required tensile forces by the Bowden cables 56 inside the flexible elements 54 onto the upper strut tubes 52 are transferable.
- levers 22, 24 are made in one piece from plastic manufactured.
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
- Seats For Vehicles (AREA)
Abstract
Description
- Fig. 1
- eine Schrägansicht eines elektrischen Kopfstützenantriebs;
- Fig. 2
- eine Schnittdarstellung eines Gelenks zur Realisierung der Abklappfunktion der Kopfstütze in Fig. 1.
Claims (20)
- Kopfstützenantrieb für Kraftfahrzeuge mit einem elektrischen Antriebsmotor (12), dadurch gekennzeichnet, daß der Motor (12) ein Hebelgetriebe (14) mit zwei sich kreuzenden, verschwenkbar gelagerten Hebeln (22, 24) antreibt, deren freie Enden (42, 44) in einer quer zur Verfahrrichtung der Kopfstütze (18) liegenden Nut (46) in einem Führungselement (48) verschieblich geführt sind, das mit der Kopfstütze (18) über wenigstens eine Strebe (16) verbunden und in einer Führung (64) in der Verfahrrichtung der Kopfstütze (18) beweglich geführt ist.
- Kopfstützenantrieb nach Anspruch 1, dadurch gekennzeichnet, daß die beiden Hebel (22, 24) getrennt voneinander um verschiedene Drehachsen (26, 28) schwenkbar gelagert sind.
- Kopfstützenantrieb nach Anspruch 2, dadurch gekennzeichnet, daß die Hebel (22, 24) mit Zahnrädern oder Zahnradsegmenten (30, 32) um ihre Drehachsen (26, 28) versehen sind, die ineinander kämmen.
- Kopfstützenantrieb nach Anspruch 3, dadurch gekennzeichnet, daß der Motor (12) über ein Untersetzungsgetriebe (38) das Zahnrad bzw. Zahnradsegment (30) eines Hebels (22) antreibt.
- Kopfstützenantrieb nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß wenigstens die Hebel (22, 24) des Hebelgetriebes (14) aus Kunststoff bestehen.
- Kopfstützenantrieb nach einem der Ansprüche 3-5, dadurch gekennzeichnet, daß die Zahnräder bzw. Zahnradsegmente (30, 32) einstückig mit den Hebeln (22, 24) ausgebildet sind.
- Kopfstützenantrieb nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß an den Hebelenden drehbar gelagerte Rollen (42, 44) vorgesehen sind, die in der Nut (46) in dem Führungselement (48) laufen.
- Kopfstützenantrieb nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß zwei Rundstreben (16) zur Verbindung des Führungselements (48) mit der Kopfstütze (18) vorgesehen sind, die in fest montierten Führungsrohren (64) geführt sind, die über die Streben (16) gleichzeitig die Führung des Führungselements (48) übernehmen.
- Kopfstützenantrieb nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die wenigstens eine Strebe (16) ein Gelenk (54) aufweist, das ein Abklappen der Kopfstütze (18) nach vorne oder hinten bei entsprechend weit ausgefahrener Kopfstütze (18) ermöglicht.
- Kopfstützenantrieb nach Anspruch 9, dadurch gekennzeichnet, daß das Strebenteil (52) zwischen Kopfstütze (18) und Gelenk (54) ausreichend lang ist, um in der obersten Gebrauchsstellung der Kopfstütze (18) eine ausreichende Führungslänge zwischen sich und dem Führungsrohr (64) bereitzuhalten.
- Kopfstützenantrieb nach Anspruch 9 oder 10, dadurch gekennzeichnet, daß die Gelenke (54) der beiden Streben (16) aus mit gummielastischem Werkstoff (58) ummantelten Zugelementen (56) bestehen.
- Kopfstützenantrieb nach einem der Ansprüche 9 bis 11, dadurch gekennzeichnet, daß die Gelenke (16) an ihren Enden jeweils über einen Gewindezapfen (60) verfügen, die in Rohrelemente (50, 52) eingeschraubt sind, welche das obere und ein unteres Strebenteil bilden.
- Kopfstützenantrieb nach einem der Ansprüche 9 bis 12, dadurch gekennzeichnet, daß die Führungsrohre (20, 64) an ihren oberen Enden Umlenkbereiche (66) besitzen, die nach vorne oder hinten offen sind und bei entsprechend weit ausgefahrener Kopfstütze (18) deren Umklappen zur offenen Seite hin ermöglichen.
- Kopfstützenantrieb nach einem der Ansprüche 9 bis 13, dadurch gekennzeichnet, daß die Führungsrohre (64) geneigt angeordnet sind.
- Kopfstützenantrieb nach Anspruch 13 oder 14, dadurch gekennzeichnet, daß der Umlenkbereich (66) aus einer Rundung (68) besteht, an die sich eine im wesentlichen horizontal ausgerichtete Auflage (70) für das obere Strebenteil (52) anschließt.
- Kopfstützenantrieb nach Anspruch 15, dadurch gekennzeichnet, daß die Rundung (68) und die Auflage (70) einen im wesentlichen halbkreisförmigen Querschnitt entsprechend dem Querschnitt des oberen Strebenteils (52) besitzen.
- Kopfstützenantrieb nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß ein Endschalter (72) vorgesehen ist, der den Verfahrweg der Kopfstütze (18) begrenzt.
- Kopfstützenantrieb nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß ein Schalter vorgesehen ist, mit welchem die Kopfstütze (18) über ihre normale Endstellung hinaus bis zum Umklappen verfahrbar ist.
- Kopfstützenantrieb nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß eine Sitzbelegungserkennung vorgesehen ist, die bei Belegung des Sitzes die Kopfstütze (18) wenigstens in ihre oberste Gebrauchsstellung zurückzieht und bei Nichtbelegung die Kopfstütze (18) umklappt.
- Kopfstützenantrieb nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß an einem oder mehreren Sitzen ein Tastschalter angeordnet ist, durch den eine elektromotorische Höhenjustierung der Kopfstütze betätigbar ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19939349 | 1999-08-19 | ||
DE19939349A DE19939349A1 (de) | 1999-08-19 | 1999-08-19 | Kopfstützenantrieb |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1077151A1 true EP1077151A1 (de) | 2001-02-21 |
EP1077151B1 EP1077151B1 (de) | 2003-04-23 |
Family
ID=7918910
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00114820A Expired - Lifetime EP1077151B1 (de) | 1999-08-19 | 2000-07-11 | Kopfstützenantrieb |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1077151B1 (de) |
DE (2) | DE19939349A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10261898A1 (de) * | 2002-12-23 | 2004-07-08 | Volkswagen Ag | Kopfstützenanordnung |
US20220258656A1 (en) * | 2021-02-17 | 2022-08-18 | Windsor Machine and Stamping (2009) Ltd. | Headrest latch with shape memory alloy release assembly |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2011648A (en) * | 1977-12-30 | 1979-07-11 | Nissan Motor | Control system for adjustable head restraint on automotive seat |
DE3637362A1 (de) * | 1985-11-26 | 1987-07-02 | Aisin Seiki | Kopfstuetzvorrichtung |
DE4023127C1 (en) * | 1990-07-20 | 1992-01-02 | Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De | Headrest for car seat - with holding and/or guide bar with flexible metal extension |
DE4304663C1 (de) * | 1993-02-16 | 1994-03-31 | Daimler Benz Ag | Kopfstütze in einem Kraftwagen, mit wenigstens einer, in einer lehnenseitigen Führung höhenverschiebbaren Tragstange |
DE29723240U1 (de) * | 1997-05-30 | 1998-06-04 | Bertrand Faure Sitztechnik GmbH & Co. KG, 31655 Stadthagen | Fahrzeugsitz, insbesondere Kraftfahrzeugsitz, mit höhenverstellbarer Kopfstütze |
-
1999
- 1999-08-19 DE DE19939349A patent/DE19939349A1/de not_active Withdrawn
-
2000
- 2000-07-11 DE DE50001838T patent/DE50001838D1/de not_active Expired - Fee Related
- 2000-07-11 EP EP00114820A patent/EP1077151B1/de not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2011648A (en) * | 1977-12-30 | 1979-07-11 | Nissan Motor | Control system for adjustable head restraint on automotive seat |
DE3637362A1 (de) * | 1985-11-26 | 1987-07-02 | Aisin Seiki | Kopfstuetzvorrichtung |
DE4023127C1 (en) * | 1990-07-20 | 1992-01-02 | Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De | Headrest for car seat - with holding and/or guide bar with flexible metal extension |
DE4304663C1 (de) * | 1993-02-16 | 1994-03-31 | Daimler Benz Ag | Kopfstütze in einem Kraftwagen, mit wenigstens einer, in einer lehnenseitigen Führung höhenverschiebbaren Tragstange |
DE29723240U1 (de) * | 1997-05-30 | 1998-06-04 | Bertrand Faure Sitztechnik GmbH & Co. KG, 31655 Stadthagen | Fahrzeugsitz, insbesondere Kraftfahrzeugsitz, mit höhenverstellbarer Kopfstütze |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10261898A1 (de) * | 2002-12-23 | 2004-07-08 | Volkswagen Ag | Kopfstützenanordnung |
DE10261898B4 (de) * | 2002-12-23 | 2011-07-14 | Volkswagen AG, 38440 | Kopfstützenanordnung |
US20220258656A1 (en) * | 2021-02-17 | 2022-08-18 | Windsor Machine and Stamping (2009) Ltd. | Headrest latch with shape memory alloy release assembly |
Also Published As
Publication number | Publication date |
---|---|
EP1077151B1 (de) | 2003-04-23 |
DE50001838D1 (de) | 2003-05-28 |
DE19939349A1 (de) | 2001-02-22 |
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